Ford Mondeo Owner's Handbook Manual page 184

Driving without a trailer
E94771
1. Remove the tow ball arm.
2. Insert the plug into its seat (1).
WARNING
Never unlock the tow ball arm
with the trailer attached.
Maintenance
CAUTION
Remove the tow ball arm and
protect the seat with the plug
before steam cleaning your vehicle.
Keep the system clean. Periodically
lubricate bearings, sliding surfaces,
and locking balls with resin-free
grease or oil and the lock with
graphite.
Towing
Keep a note of the key number. In
case of loss, replacement keys are
available from the manufacturer by
stating the 4-digit key number.
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